
Difference Engine No. 1
circa 1832
circa 1832
1801-1830
1801
1815-1825
1819
1800-1830
1829
1796-1798
1835
1838
1801-1840 (original); 1901 (model)
1805
1839 (original); circa 1988 (replica)
1821
1806
1840
1837
1837
1837
1820
1822-1840
1803-1828
circa 1840
1839
1795-1805 (original)
1821-1831
1837
1839
1955; 1830
1826
1808
1799
1805
1796-1826
1800-1830
1796-1797
1801-1830
1837
1797-1804
circa 1800
1838
1808
1809
circa 1810
1837
1834
1829
1832
1834
1834